SU145030A1 - The way to silence pauses in magnetic sound recordings - Google Patents
The way to silence pauses in magnetic sound recordingsInfo
- Publication number
- SU145030A1 SU145030A1 SU730073A SU730073A SU145030A1 SU 145030 A1 SU145030 A1 SU 145030A1 SU 730073 A SU730073 A SU 730073A SU 730073 A SU730073 A SU 730073A SU 145030 A1 SU145030 A1 SU 145030A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- pauses
- silence
- way
- sound recordings
- magnetic sound
- Prior art date
Links
Landscapes
- Control Of Amplification And Gain Control (AREA)
Description
Изобретение относитс к способам обесшумливани пауз в магнитной звукозаписи.This invention relates to methods for de-cluttering pauses in magnetic sound recordings.
Способы обесшумливани пауз в магнитной звукозаписи с использованием высокочастотного смещени путем автоматического уменьшени усилени канала записи известны.Methods for de-cluttering pauses in magnetic sound recordings using high-frequency bias by automatically reducing the gain of the recording channel are known.
Авторами предложен новый способ обесшумливани пауз, заключающийс в том, что ток высокочастотного смещени в головке записи автоматически уменьшаетс в паузах записываемого сигнала путем воздействи на генератор тока высокочастотного нодмагничивани управл ющего (запирающего) импульса, сформированного из сигнала, подлежащего записи. Формирование импульса происходит в процессе записи и не имеет пр мого воздействи на полезный сигнал, что позвол ет получать неискаженную запись как по уровню, так и по нелинейным и частотным показател м.The authors have proposed a new method of de-clouding the pauses, which means that the high-frequency current in the recording head automatically decreases during the pauses of the recorded signal by acting on the high-frequency nodomagnetising current generator of the control (locking) pulse formed from the signal to be recorded. The formation of a pulse occurs during the recording process and does not have a direct effect on the useful signal, which makes it possible to obtain an undistorted recording both in terms of level and nonlinear and frequency indices.
На чертеже изображена блок-схема устройства дл записи с автоматически измен емым током смещени .The drawing shows a block diagram of a recording device with automatically variable bias current.
В схеме прин ты следующие обозначени ; усилитель 1 напр жени , ограничитель 2 по минимуму; ограничитель 3 по максимуму; усилитель 4 пр моугольных импульсов; выпр митель 5; электронное реле 6; генератор 7 тока высокочастотного подмагничивани ; усилитель 8 записи; головка 9 записи.In the scheme, the following notation is used; voltage amplifier 1, limiter 2 at a minimum; limiter 3 to the maximum; amplifier 4 rectangular pulses; straightener 5; electronic relay 6; a high-frequency bias current generator 7; recording amplifier 8; recording head 9.
В современных системах магнитной записи с высокочастотным смещением величина тока высокочастотного подмагничивани устанавливаетс из расчета получени оптимальных характеристик и не измен етс при записи. Если ток смещени увеличивать или уменьшать, то уровень записи резко уменьшаетс . Согласно предложенному способу, уменьша величину тока смещени в паузах и восстанавлива ее до оптимальной величины на полезном сигнале, можно получить запись,In modern high-frequency bias magnetic recording systems, the magnitude of the high-frequency bias current is established on the basis of obtaining optimal performance and does not change during recording. If the bias current is increased or decreased, the write level decreases dramatically. According to the proposed method, by reducing the magnitude of the bias current in the pauses and restoring it to the optimal value on the useful signal, you can get a record
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU730073A SU145030A1 (en) | 1961-05-10 | 1961-05-10 | The way to silence pauses in magnetic sound recordings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU730073A SU145030A1 (en) | 1961-05-10 | 1961-05-10 | The way to silence pauses in magnetic sound recordings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU145030A1 true SU145030A1 (en) | 1961-11-30 |
Family
ID=48300637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU730073A SU145030A1 (en) | 1961-05-10 | 1961-05-10 | The way to silence pauses in magnetic sound recordings |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU145030A1 (en) |
-
1961
- 1961-05-10 SU SU730073A patent/SU145030A1/en active
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